The word(s) "mercy" appears 168 time(s) in 158 verse(s) in Quran in Mohsin Khan translation.

(11) And obey Allah and the Messenger (Muhammad صلى الله عليه وسلم) that you may obtain mercy.

(12) And if you are killed or die in the Way of Allah, forgiveness and mercy from Allah are far better than all that they amass (of worldly wealths).

(13) And by the mercy of Allah, you dealt with them gently. And had you been severe and harsh-hearted, they would have broken away from about you; so pass over (their faults), and ask (Allah's) Forgiveness for them; and consult them in the affairs. Then when you have taken a decision, put your trust in Allah, certainly, Allah loves those who put their trust (in Him).

(14) When there comes to them some matter touching (public) safety or fear, they make it known (among the people); if only they had referred it to the Messenger or to those charged with authority among them, the proper investigators would have understood it from them (directly). Had it not been for the Grace and mercy of Allah upon you, you would have followed Shaitan (Satan), save a few of you.

(15) Degrees of (higher) grades from Him, and Forgiveness and mercy. And Allah is Ever Oft-Forgiving, Most Merciful.

(16) Had not the Grace of Allah and His mercy been upon you (O Muhammad صلى الله عليه وسلم), a party of them would certainly have made a decision to mislead you, but (in fact) they mislead none except their own selves, and no harm can they do to you in the least. Allah has sent down to you the Book (The Qur'an), and Al-Hikmah (Islamic laws, knowledge of legal and illegal things i.e. the Prophet's Sunnah - legal ways), and taught you that which you knew not. And Ever Great is the Grace of Allah unto you (O Muhammad صلى الله عليه وسلم).

(17) So, as for those who believed in Allah and held fast to Him, He will admit them to His mercy and Grace (i.e. Paradise), and guide them to Himself by the Straight Path.

(18) Say (O Muhammad صلى الله عليه وسلم): "To whom belongs all that is in the heavens and the earth?" Say: "To Allah. He has prescribed mercy for Himself. Indeed He will gather you together on the Day of Resurrection, about which there is no doubt. Those who have lost themselves will not believe [in Allah as being the only Ilah (God), and Muhammad صلى الله عليه وسلم as being one of His Messengers, and in Resurrection].

(19) When those who believe in Our Ayat (proofs, evidence, verses, lessons, signs, revelations, etc.) come to you, say: "Salamun 'Alaikum" (peace be on you); your Lord has written (prescribed) mercy for Himself, so that if any of you does evil in ignorance, and thereafter repents and does righteous good deeds (by obeying Allah), then surely, He is Oft-Forgiving, Most Merciful.

(20) And your Lord is Rich (Free of all needs), full of mercy; if He wills, He can destroy you, and in your place make whom He wills as your successors, as He raised you from the seed of other people.